1、按照官方的步骤进行操作

http://docs.typecho.org/plugins/wordpress-to-typecho

2、拷贝wordpress的附件wp-content/uploads到 typecho 的 usr/uploads

3、更改数据库中的附件链接

use typecho;
update typecho_contents set text=replace(text,'wp-content/uploads','usr/uploads');

4、nginx静态化

location / {
    if (-f $request_filename/index.html){
         rewrite (.*) $1/index.html break;
    }
    if (-f $request_filename/index.php){
        rewrite (.*) $1/index.php;
    }
    if (!-f $request_filename){
        rewrite (.*) /index.php;
    }
}